Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Philipp A Hoehn"'
Publikováno v:
SciPost Physics, Vol 17, Iss 2, p 048 (2024)
We develop a framework based on the covariant phase space formalism that identifies gravitational edge modes as dynamical reference frames. As such, they enable both the identification of the associated spacetime region and the imposition of boundary
Externí odkaz:
https://doaj.org/article/b99882701e314b97b0e5c13ab53bf704
Publikováno v:
Quantum, Vol 4, p 225 (2020)
Treating reference frames fundamentally as quantum systems is inevitable in quantum gravity and also in quantum foundations once considering laboratories as physical systems. Both fields thereby face the question of how to describe physics relative t
Externí odkaz:
https://doaj.org/article/44e62aa271bd41288d290f656d7ea05d
Publikováno v:
Quantum, Vol 4, p 225 (2020)
Treating reference frames fundamentally as quantum systems is inevitable in quantum gravity and also in quantum foundations once considering laboratories as physical systems. Both fields thereby face the question of how to describe physics relative t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc61a58e3da87a41727a6437400a775b
https://doi.org/10.22331/q-2020-01-27-225
https://doi.org/10.22331/q-2020-01-27-225
Publikováno v:
Quantum, Vol 5, p 530 (2021)
In a quantum world, reference frames are ultimately quantum systems too -- but what does it mean to "jump into the perspective of a quantum particle"? In this work, we show that quantum reference frame (QRF) transformations appear naturally as symmet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d72878959e522b436a4de6560fd917d3
https://doi.org/10.22331/q-2021-08-27-530
https://doi.org/10.22331/q-2021-08-27-530
Autor:
Heinz-Juergen Brauch, Thilo Hofmann, Robert Brünjes, Philipp A Hoehn, Frank Thomas Lange, Andrea Bichler
Publikováno v:
Science of The Total Environment. 571:1432-1440
The growing use of gadolinium-based contrast agents in magnetic resonance imaging (MRI) leads to an increasing input of anthropogenic gadolinium (Gdanth) into natural environments. Conventional sewage treatment is unable to remove Gdanth and since MR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22e74afd0c9b971c52a260fbb29b526d
https://doi.org/10.1016/j.scitotenv.2016.06.105
https://doi.org/10.1016/j.scitotenv.2016.06.105
Autor:
Philipp A Hoehn
Publikováno v:
Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfff94e2eb7bde43111c89629b62581c
https://doi.org/10.22323/1.224.0164
https://doi.org/10.22323/1.224.0164
Autor:
Bianca Dittrich, Philipp A Hoehn
Publikováno v:
Classical and quantum gravity
A general canonical formalism for discrete systems is developed which can handle varying phase space dimensions and constraints. The central ingredient is Hamilton's principal function which generates canonical time evolution and ensures that the can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6473be8f6385ba71e7ad6003036257f
https://hdl.handle.net/11858/00-001M-0000-0012-14D7-F11858/00-001M-0000-0012-14D8-D
https://hdl.handle.net/11858/00-001M-0000-0012-14D7-F11858/00-001M-0000-0012-14D8-D
Autor:
Philipp A Hoehn, Bianca Dittrich
Publikováno v:
Classical and Quantum Gravity
Classical and Quantum Gravity, IOP Publishing, 2010, 27 (15), pp.155001. ⟨10.1088/0264-9381/27/15/155001⟩
Classical and quantum gravity
Classical and Quantum Gravity, IOP Publishing, 2010, 27 (15), pp.155001. ⟨10.1088/0264-9381/27/15/155001⟩
Classical and quantum gravity
Starting from an action for discretized gravity we derive a canonical formalism that exactly reproduces the dynamics and (broken) symmetries of the covariant formalism. For linearized Regge calculus on a flat background -- which exhibits exact gauge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8680b5fe26db3070721064a038dc063
https://hal.archives-ouvertes.fr/hal-00613871/file/PEER_stage2_10.1088%2F0264-9381%2F27%2F15%2F155001.pdf
https://hal.archives-ouvertes.fr/hal-00613871/file/PEER_stage2_10.1088%2F0264-9381%2F27%2F15%2F155001.pdf
Autor:
Philipp A Hoehn, Susan M. Scott
It has long been a primary objective of cosmology to understand the apparent isotropy in our universe and to provide a mathematical formulation for its evolution. A school of thought for its explanation is quiescent cosmology, which already possesses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f20d327770b10b4a8accc95f7aa752ae
Autor:
Susan M. Scott, Philipp A Hoehn
Quiescent cosmology and the Weyl curvature hypothesis possess a mathematical framework, namely the definition of an Isotropic Singularity, but only for the initial state of the universe. A complementary framework is necessary to also encode appropria
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4caaac0938c135dca99efc8147c17852